"A theory of knowledge is an answer to the question "What is knowledge?" This question, like many which are asked by philosophers, sounds very simple. We all know, at least roughly, what knowledge is. But difficulties appear the moment that we begin to fill in the details."

"Motion with respect to the universal ocean of aether eludes us. We say, "Let V be the velocity of a body through the aether", and form the various electromagnetic equations in which V is scattered lib…"

"He always gave new technical knowledge to the engineers and at that moment his face was lit with joy."

"There's a theory someone told me that the age you become famous is the age you're mostly going to stay forever. Which is kind of offensive! But there's a grain of truth to it. I'm always going to have…"

"The day has clearly gone forever of societies small enough for their members to have personal acquaintance with one another, and to find their station through the appraisal of those who have first han…"